Removable trolley shoe



wQe. LAMB."

REMOVABLE TROLLEY SHOE.

APPLICATION FILED MAY 9 1921.

1,402,07 6.. Patented Jan. 3, 1922,.

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WILLIAM G. LAMB, or warnnnoo, IOWA, ASSIGNOR ro n. r. woonnrne GOMPANY, or WATEBLQO, IOWA, 7

REMOVABLE TROLLEY SHOE.

moaore.

Application filed May 9, 1921. Serial No. 467,981.

To all to item it may concern a citizen of the United States-of America, and a resident of Waterloo, Blackhawk County, Iowa, have invented certain new and useful Improvements in Removable Trolley Shoes, of which the following is a specification.

This invention relates to improvements in removable shoes for trolley-wheels, and the object of the improvement is to provide a shoe for sliding electrical contact with a trolley-wire secured removably upon the trolley wheel whereby either the sliding shoe or the trolley-wheel may be employed as desired. Particularly, an object of this combination is to permit a sliding shoe contact with a trolley wire at times when the vehicle on which it is mounted is travelling between stations, and a rolling contact when the vehicle, whether locomotive or car, is being used for switching purposes.

A sliding contact gives a superior result when the vehicle is travelling because the current is collected with less loss, less noise, less Wear on the wire, and at less expense. In switching operations, the use of a trolley wheel is better rather than a sliding contact shoe for the reason that such a shoe, when backing up through switches, is likely to become entangled with and damage the overhead wires and appurtenances. My removable shoe is superior to the ordinary shoe fixed on a trolley pole as in case of accidental damage to the shoe, it may be quickly removed and another inserted, or the trolley wheel used instead.

The above objects have been accomplished by the means which are hereinafter described and claimed, and which are illustrated in the accompanying drawings, in which Fig. 1 is a side elevation of my improved shoe as releasably mounted and secured upon a trolley-wheel, and Fig. 2 is a front elevation of the same. Fig. 3 is a detail side elevation of said shoe and its fastening means as removed from the trolley-wheel; Fig. 4: is a cross-section of a trolley-wire, said shoe, and the tread portion of a trolley-wheel, as operatively assembled together, and Fig. 5 is an elevation of one end of the shoe-body showing the T-head thereon.

Similar numerals of reference denote cor- Specification of Letters Patent.

. Patented Jan. 3, 1922.

responding parts throughout the several views.

The trolley-wheel .Zis rotatably mounted between the terminal forks of a trolley head 8 on a trolley-pole 11.

The numeral 1 denotes a trolley-shoe of semi-circular or arcuate contour whose upper edge is longitudinally concaved or troughed for sliding electrical contact with and to prevent its lateral displacements from an elevated trolley-wire 3. The under or concave edge of said shoe is made triangular in cross section to fit in electrical contact the V-shaped circumferential groove of the trolley-wheel 2.

The forward depending end of the shoe 1 is diminished and supplied with a T-head 4.. In a cross web of the bifurcation of the trolley-head 8 is located a slot 5 elongated longitudinally therewith and opening into the interspace of the bifurcations. The trolley-shoe 1 may be secured to the trolleyhead 8 by first placing it at an angle therewith to permit the T-head 4 to traverse the slot 5, and then the shoe is turned ninety degrees causing the T-head to become interlocked with the trolley-head 8, the shoe 1 then being swung over to engage the circumferential groove of the trolley-wheel 2. The opposite end of the shoe 1 has a transverse hole to receive an end-link of a short chain 7 which has a terminal hook 6, the latter having the usual movable tongue whereby it may be interlinked with a ring 9 loosely mounted in an orificed integral car 10 projecting from the lower face of the trolleyhead 8. It will be seen that said engagingmeans for and the chain-connection 7-6 secures the shoe removably upon the trolley wheel although somewhat loosely and not rigidly, as it is desirable that a little relative play be permitted so that the shoe may adjust itself for backing-up movements or otherwise without breakage.

The shoe is easily removed for replacement, or to permit alternative use of the trolley-wheel.

Having described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A conducting shoe for electrical sliding contact with an electrical conductor, and a trolley-wheel upon which said shoe is removably mounted.

tact'with said shoe, and meansfor see-tiring said shoe removebly upon said trolley-wheel V 3. A conducting "shoe for electrical slid:

is mg oontact with an electrical conductor anti having one 7 end, formed with" engaging- 7 'means, a trolley head" having engaging.

means adapted-to: releasably interlock with r the enge'gingsmeans'on said shoe, and a trol said shoe being loosely seated upon and ley-wheel mounted upon said trolleysheed,

engaging the groove in said-Wheel;

4. in coinbinetion atrolley-head, e troileywvheel mountedrthereon, a sliding-contact shoe seated upon seiki Wheel and hanrii'ig o le' end formed at one end with a T-head, said.

trolley-head having an elongated slot to receive seidT-head and interlock detachably therewith, and also having an orificed ear, and flexible connectingmeans sepambiy 0011+ nested between the opposite end of said shoe and said'ear'to clamp the shoe removebly upon said trolleyavheel Signet"! at ,Wetejrloo, Iowa, this 9th day ofApriLlQQl. V V I Y or WILLIAM QLAMBL 

